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## org.bouncycastle.crypto.kems
Class ECIESKEMGenerator

    java.lang.Object
      org.bouncycastle.crypto.kems.ECIESKEMGenerator

All Implemented Interfaces:
  EncapsulatedSecretGenerator

public class ECIESKEMGenerator
extends java.lang.Object
implements EncapsulatedSecretGenerator

The ECIES Key Encapsulation Mechanism (ECIES-KEM) from ISO 18033-2.

Constructor Summary
`ECIESKEMGenerator(int keySize, DerivationFunction kdf, java.security.SecureRandom rnd)` Set up the ECIES-KEM.
`ECIESKEMGenerator(int keyLen, DerivationFunction kdf, java.security.SecureRandom rnd, boolean cofactorMode, boolean oldCofactorMode, boolean singleHashMode)` Set up the ECIES-KEM.

Method Summary
`SecretWithEncapsulation` | `generateEncapsulated(AsymmetricKeyParameter recipientKey)` Generate secret/encapsulation based on the recipient public key.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ECIESKEMGenerator

    public ECIESKEMGenerator(int keySize,
                             DerivationFunction kdf,
                             java.security.SecureRandom rnd)

  Set up the ECIES-KEM.

Parameters:
  `keySize` - size of the key to be generated (in bytes).
  `kdf` - the key derivation function to be used.
  `rnd` - the random source for the session key.

### ECIESKEMGenerator

    public ECIESKEMGenerator(int keyLen,
                             DerivationFunction kdf,
                             java.security.SecureRandom rnd,
                             boolean cofactorMode,
                             boolean oldCofactorMode,
                             boolean singleHashMode)

  Set up the ECIES-KEM.

Parameters:
  `keyLen` - length in bytes of key to generate
  `kdf` - the key derivation function to be used.
  `rnd` - the random source for the session key.
  `cofactorMode` - if true use the new cofactor ECDH.
  `oldCofactorMode` - if true use the old cofactor ECDH.
  `singleHashMode` - if true use single hash mode.

Method Detail

### generateEncapsulated

    public SecretWithEncapsulation generateEncapsulated(AsymmetricKeyParameter recipientKey)

  Description copied from interface: `EncapsulatedSecretGenerator`
  Generate secret/encapsulation based on the recipient public key.

  Specified by:
    `generateEncapsulated` in interface `EncapsulatedSecretGenerator`
  Returns:
    An SecretWithEncapsulation derived from the recipient public key.

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